Loniten and Pregnancy

When the active ingredient in Loniten (minoxidil oral) was given to pregnant animals, it appeared to cause reduced litter size and miscarriages. Based on these studies, Loniten is considered a pregnancy Category C medication, meaning it may not be safe to use if you are expecting. Your healthcare provider may still prescribe the drug, however, if the benefits outweigh the risks.

Can Pregnant Women Take Loniten?

Loniten® (minoxidil oral) is a prescription antihypertensive medication used to control severe blood pressure. Based on the results of animal studies, it may not be safe for pregnant women to take Loniten.

What Is Pregnancy Category C?

The U.S. Food and Drug Administration (FDA) uses a category system to classify the possible risks to a fetus when a specific medicine is taken during pregnancy. Pregnancy Category C is given to medicines that have not been adequately studied in pregnant humans but do appear to cause harm to the fetus in animal studies.
In addition, medicines that have not been studied in any pregnant women or animals are automatically given a pregnancy Category C rating.
There is very little information available on Loniten use in pregnancy. In animal studies, Loniten did not cause birth defects when given in high doses to pregnant rats and rabbits. However, it did reduce litter sizes and caused miscarriages in rabbits.
There has been at least one report of abnormal hair growth (a known Loniten side effect) in an infant born to a mother who took minoxidil (the active ingredient in Loniten) throughout pregnancy. The infant also had various birth defects, including a heart defect and facial abnormalities. The mother was taking other blood pressure medications, however, in addition to minoxidil. Therefore, the birth defects cannot necessarily be attributed to minoxidil use; they may have been caused by the other medications or some other, unknown factor.
It is important to note that animals do not always respond to medicines in the same way that humans do. Therefore, pregnancy Category C medicines, including Loniten, may be given to a pregnant woman if her healthcare provider believes that the benefits to the woman outweigh any possible risks to her unborn child.
Pregnancy and Pain

Loniten Medication Information

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